HELLEBORUS niger
Plant Description
Best Sowing Date (northern Hemisphere, Field condition): |
early summer - late summer |
Sowing Time Hint: | For best results sow after harvest, approx. July. |
Sowing to Germination: | 16 - 24 weeks |
Germination to Transplant: | 4 - 8 weeks |
Transplanting to Potting: | 6 - 10 weeks |
Cutting back at Transplanting: | Not Necessary. |
Container Size(s): | 1-2 plugs per 11/12 cm (4 1/2") / 2-3 plugs per 15 cm (6") |
Vernalization: | There is no current research on vernalization but a prudent recommendation for any perennial would be 6-12 weeks (a few might need 15 weeks!) at an average daily temperature of 40°F (5°C). Exposure to cold may not be necessary for flowering but might improve quality. |
Forcing: | This species is not a suitable candidate for forcing. |
Fertilizer: | Medium (150-200 ppm) |